Parameters: (float SensitivityX, optional float SensitivityY)

Toggles between FOV 80 and the players desired FOV.
SensitivityX and SensitivityY are multiplicative factors on mouse sensitivity in their respective directions (X is side-to-side / yaw, Y is up-down / pitch) while zooming.

If SensitivityY is not provided by the user, it is assumed to be the same as SensitivityX.
Examples

    Same sensitivity as un-zoomed: ZoomToggle 1.0
    Half the sensitivity as un-zoomed: ZoomToggle 0.5